Cloud Discussions

FabricPool functionality on openstack swift

josephillips

Hi

 

Im working with fabricpool and openstack swift with S3 Middleware is working great but i see a behaivor that i wish to understand.

 

i have a volume configured tiering policy with snapshot-only  during random times on day i saw the netapp is performing a lot of GET from the object storage

 

my questions is ?

1.Why is performing a lot of GETS if the policy is snapshot-only and nobody is performing a restore of snapshots?

2.if the object storage is down and i have snapshot-only policy can affect the access to the data on the performance tier?

 

thanks

3 REPLIES 3

manistorage

can you share the output of the below

volume show-footprint -vserver  vserver-name -volume vol-name

 

1.Why is performing a lot of GETS if the policy is snapshot-only and nobody is performing a restore of snapshots?

My Guess --  If the local tier is at >90% capacity, cold data is read directly from the cloud tier without being written back
to the local tier. By preventing cold data write-backs on heavily utilized local tiers, FabricPool preserves
the local tier for active data. 

2.if the object storage is down and i have snapshot-only policy can affect the access to the data on the performance tier?

-- If for any reason connectivity to the cloud is lost, the FabricPool local tier remains online, but applications
receive an error message when attempting to get data from the cloud tier.

--Cold blocks that exist exclusively on the cloud tier remain unavailable until connectivity is reestablished.

josephillips


Vserver: svmTC-Store
Volume Name: vol_data
Volume MSID: 2163438862
Volume DSID: 1033
Vserver UUID: 3328e1b7-59f2-11e8-9d50-00a098d5bef2
Aggregate Name: aggr_Data00_TC_NetApp1210_01
Aggregate UUID: cc5224b9-ca9c-41f1-a62d-428b7188cdf6
Hostname: TC-NETAPP1210-01
Tape Backup Metadata Footprint: -
Tape Backup Metadata Footprint Percent: -
Deduplication Footprint: 23.29GB
Deduplication Footprint Percent: 0%
Temporary Deduplication Footprint: -
Temporary Deduplication Footprint Percent: -
Cross Volume Deduplication Footprint: 72.45MB
Cross Volume Deduplication Footprint Percent: 0%
Cross Volume Temporary Deduplication Footprint: -
Cross Volume Temporary Deduplication Footprint Percent: -
Volume Data Footprint: 4.42TB
Volume Data Footprint Percent: 41%
Flexible Volume Metadata Footprint: 30.98GB
Flexible Volume Metadata Footprint Percent: 0%
Delayed Free Blocks: 40.73GB
Delayed Free Blocks Percent: 0%
SnapMirror Destination Footprint: -
SnapMirror Destination Footprint Percent: -
Volume Guarantee: 0B
Volume Guarantee Percent: 0%
File Operation Metadata: -
File Operation Metadata Percent: -
Total Footprint: 4.52TB
Total Footprint Percent: 42%
Containing Aggregate Size: 10.73TB
Name for bin0: Performance Tier
Volume Footprint for bin0: 4.08TB
Volume Footprint bin0 Percent: 91%
Name for bin1: tm_swift_1210
Volume Footprint for bin1: 393.3GB
Volume Footprint bin1 Percent: 9%

manistorage

Hi,

only 9% of data is in your S3 bucket.

 

only Volume Footprint for bin1: 393.3GB
Volume Footprint bin1 Percent: 9%

 

Regards,

Mani

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